SU1301539A1 - Arrangement for rolling thread - Google Patents

Abstract

The invention relates to the field of machine-tool construction, in particular to equipment for rolling threads, and can be used when rolling threads on short non-rigid blanks. The aim of the invention is to expand the technological capabilities by providing thread rolling on short non-rigid blanks (L 13 10 with SP 00 with

Description

13G

kah. In the machining process, the first and second machining stages T1 will walk with the thread-rolling rollers 10. The base 4 of the second thread-rolling head is spring-loaded to the body 1 by springs 3. When the workpiece leaves the contact with the thread1

The invention relates to the field of machine-tool construction, in particular to equipment for rolling threads, and can be used when rolling threads on short non-rigid blanks.

The aim of the invention is the expansion of technological capabilities by providing thread rolling on short non-rigid blanks.

FIG. Figure 1 shows schematically a thread-rolling device, a slit; FIG. 2 is a section A-A in FIG. one,

The device includes a housing 1 in which the base 3 of the first-stage thread rolling head is fixed by means of screws 2.

The base 4 of the threading head of the second stage is located in the housing 1 with the possibility of axial transmission and is spring-loaded to the housing by springs 5. Each thread rolling head has axes 6 fixed to bases 3 and 4, respectively, for example, by screw connection 7, on eccentric sections 8 axes 6, gears 9 are mounted on bearings and are associated with thread rolling rollers 10, for example, a cam clutch. The lid 11 of the first-stage threaded-head head faces the lid 12 of the second-stage thread-rolling head. The covers 11 and 12 are fixed in axles x 6, for example, by screws 13. In the cover 12 in the radial direction there are spring-loaded crawlers 1 and 14 with axes 15, on which rollers 16 are freely mounted, the thread profile of which corresponds

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with the rolling rollers 1Q of the first thread rolling rod, it begins to contact the rollers 16 and, rotating, moves to the contact zone with the rollers 1C of the second thread rolling head. Due to the fact that the rollers 16 and the base 4 are spring-loaded, jamming of the workpiece and its unstressed transition to the second stage of processing are eliminated. 2 Il.

profile thread rolling rollers 10 thread rolling heads of the first stage. The bases 3 and 4 of the threaded heads of both stages are provided with guide angles 17. The gears 9 engage with the gears 18 of the drive shaft 19 (not shown), and also with the gears 20 (as shown in Fig. 2). The gears 20 are arranged in an adjustable position in the housing 1 by means of strips 21 and screws 22. The gear ratio of Zg to the first-stage thread rolling head is less than the gear ratio of Z to the Z-thread rolling head

1B

second stage.

The threading device operates as follows.

The rotation from the shaft 19 is connected to the thread rolling rollers 10 of both thread rolling heads. The workpiece (shown by a thin line in FIG. 1), passed through the bolt 11, rotates around its axis and comes into contact with the rollers 16. At the moment when the first workpiece comes out of contact with the rollers 10 of the first-stage rolling head, the second workpiece is still in contact with them and, rotating, transfers the rotation to the first billet due to the trenches of their end surfaces.

In the event that the threads on the first workpiece and on the rollers 16 do not coincide or the first workpiece does not rotate, the rollers 16 move in the radial direction, eliminating the jamming of the workpiece. At.

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Further axial movement of the workpiece, it is captured by the rollers 10 of the second-stage thread rolling head, which make the final thread rolling. In the event that the threads of the workpiece and the rollers of the second threading head of the second stage do not coincide, it moves axially, compressing the spring 5 due to the fact that the rollers 10 of the second stage rolling head rotate faster than the rollers 10 of the first stage threading head. A quick retraction of the workpiece is provided, which allows the thread rolling head of the second stage to return to its original position under the action of the springs 5, maintaining contact between the workpieces that are currently located in the clamps 11 and 12.

The changeover of the device to another size of the blanks is carried out by turning the axles 6 and adjusting the position of the gears 20..

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five

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Claims (1)

Claims An apparatus for rolling-threading comprising a housing with first and second thread rolling heads coaxially disposed therein and a rotational drive for the thread rolling rollers of both thread rolling heads, in order to expand the technological capabilities by providing thread rolling for short non-rigid billet, the second thread rolling head is spring-loaded to the body with the possibility of axial movement relative to the first one and is provided with a buckle, in the radial grooves of which the subgr ginned sliders with threaded rollers mounted on their axes, and the gear ratio of the drive chain of rotation of the thread rolling rollers of the first thread rolling head is less than the gear ratio of the drive chain or the thread rolling rollers of the thread rolling head. 20 lPui.2 Compiled by A. Kolosovsky Editor N. Egorova Tekred I. Popovich Order 1177/11 Circulation 583 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader A. Zimokosov